Views:3 Author:Site Editor Publish Time: 2020-11-04 Origin:Site
Due to the development of modern industry in the 21st century, new requirements for the quality of steel have been put forward, so almost all converters and electric arc furnaces are equipped with ladle refining furnaces.
In the molten steel refining process, slag and alloy are added according to the process requirements, so physical changes and chemical reactions occur, and a large amount of smoke and dust are generated, which will pollute the working environment and cause harm to organisms.
In order to achieve ideal results for the exhaust and dust removal of the refining furnace, it is necessary to determine the maximum exhaust volume, smoke composition and smoke temperature generated by the overall design of the equipment according to the molten steel refining process conditions.
As the basis for pipeline design and selection of dust collector. Refining conditions and formation and control of flue gas. Generally speaking, the reduction period is carried out in the electric arc furnace and the converter, and now it is completed in the furnace.
Therefore, in accordance with the requirements of the smelting process, a positive pressure is maintained in the furnace to produce reduced slag. To control the positive pressure in the furnace, the flue gas is sprayed out from the electrode hole, the charging port, the furnace door and the junction of the furnace cover and the ladle.
In order to control the smelting atmosphere in the furnace and prevent smoke from all parts, one part is solved by using a special structure in the equipment design, and the other part is to automatically adjust the inside and outside of the furnace through the action of the water-cooled flap valve through the pressure change in the furnace. The amount of exhaust smoke keeps the pressure in the furnace basically within the range. Compared with electric arc furnace and converter, the flue gas volume of refining furnace is relatively small. In the past, it was usually determined by the amount of flue gas produced during the reduction period of the electric arc furnace.
However, the discharge of electric arc furnace is mainly a combination of the exhaust of the inside and outside of the furnace. Almost all refining furnaces use smoke outside the furnace, which does not affect the temperature change in the furnace. At the same time, because the outside air is attracted, the temperature of the flue gas in the pipe is lower, and the furnace cover exhausts smoke.